perlmagick 6.88: new recipe

New formula for PerlMagick, a Perl interface for ImageMagick.
Removing redundant comments

Removing commented config options that are needed for compilation
updating perlmagick with recommendations

making recommended changes
perlmagick.rb update: cleaning freetype

Updated freetype include directory to reference X11 first, then Homebrew
Editing the caveats

So that the version is automatically defined.  I had to think of an alternate way to get the version because the linking to /usr/local doesn't happen until the clean up stage which is after the caveats.
perlmagick: add 6.88 bottle.